package com.itheima.reggie.srevice.impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.srevice.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;


@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     *
     * @param orders
     */
    public void submit(Orders orders) {
        //获取用户Id
        Long currentId = BaseContext.getCurrentId();
        //通过用户Id得到购物车的商品
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, currentId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(queryWrapper);

        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new CustomException("购物车为空，请先加入购物车！");
        }

        //查询用户数据
        User user = userService.getById(currentId);
        //查询地址
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook == null) {
            throw new CustomException("地址有误，不能下单！");
        }
        long orderId = IdWorker.getId();   //生成订单号
        //线程安全的原子操作的int类型
        AtomicInteger amount = new AtomicInteger(0);
        List<OrderDetail> orderDetailList = shoppingCartList.stream().map(item -> {
            //将每个菜品或套餐添加到订单明细中
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;

        }).collect(Collectors.toList());




        //向订单表添加数据，一条数据
        //orders数据补完整


        orders.setNumber(String.valueOf(orderId));
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);   //2 - 代付款
        orders.setAmount(new BigDecimal(amount.get()));     //总金额
        orders.setUserId(currentId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                        + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                        + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                        + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        this.save(orders);
        //向订单明细表添加数据，多条数据
        orderDetailService.saveBatch(orderDetailList);

        //清空购物车

        shoppingCartService.remove(queryWrapper);

    }
}